{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:EUFOBK6RR5FL4XHI3M5QR23DUX","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"55a9e77211880b7f8bc2d650b87e6a7f10979f96f2cbc9035e53de9cb43deeb1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-10-12T18:00:01Z","title_canon_sha256":"d64962806bede66c9cdeef76a32da8bc226097e5959a8b3bb67d2021a45500bd"},"schema_version":"1.0","source":{"id":"2110.06222","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2110.06222","created_at":"2026-07-05T03:42:51Z"},{"alias_kind":"arxiv_version","alias_value":"2110.06222v1","created_at":"2026-07-05T03:42:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.06222","created_at":"2026-07-05T03:42:51Z"},{"alias_kind":"pith_short_12","alias_value":"EUFOBK6RR5FL","created_at":"2026-07-05T03:42:51Z"},{"alias_kind":"pith_short_16","alias_value":"EUFOBK6RR5FL4XHI","created_at":"2026-07-05T03:42:51Z"},{"alias_kind":"pith_short_8","alias_value":"EUFOBK6R","created_at":"2026-07-05T03:42:51Z"}],"graph_snapshots":[{"event_id":"sha256:0dcab897551190361267f75c4abc4e4aa950eb7c7c3e3f809c7c6099b029eb09","target":"graph","created_at":"2026-07-05T03:42:51Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2110.06222/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Optically luminous quasars at $z > 5$ are important probes of super-massive black hole (SMBH) formation. With new and future radio facilities, the discovery of the brightest low-frequency radio sources in this epoch would be an important new probe of cosmic reionization through 21-cm absorption experiments. In this work, we systematically study the low-frequency radio properties of a sample of 115 known spectroscopically confirmed $z>5$ quasars using the second data release of the Low Frequency Array (LOFAR) Two Metre Sky survey (LoTSS-DR2), reaching noise levels of $\\sim$80 $\\mu$Jy beam$^{-1}","authors_text":"A. Drabent, A. J. Gloudemans, A. Saxena, B. P. Venemans, D. J. B. Smith, D. J. Schwarz, G. Calistro Rivera, G. K. Miley, H. J. A. R\\\"ottgering, K. J. Duncan, M. Br\\\"uggen, M. J. Hardcastle, P. N. Best, T. W. Shimwell, W. L. Williams","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-10-12T18:00:01Z","title":"Low frequency radio properties of the $z>5$ quasar population"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.06222","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:f0fcee5785c432d96aa0353c6cdb8a53731298d9c20f895273b1cb5cb8c245cc","target":"record","created_at":"2026-07-05T03:42:51Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"55a9e77211880b7f8bc2d650b87e6a7f10979f96f2cbc9035e53de9cb43deeb1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-10-12T18:00:01Z","title_canon_sha256":"d64962806bede66c9cdeef76a32da8bc226097e5959a8b3bb67d2021a45500bd"},"schema_version":"1.0","source":{"id":"2110.06222","kind":"arxiv","version":1}},"canonical_sha256":"250ae0abd18f4abe5ce8db3b08eb63a5e79f443281235413069d3f6f42dd2624","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"250ae0abd18f4abe5ce8db3b08eb63a5e79f443281235413069d3f6f42dd2624","first_computed_at":"2026-07-05T03:42:51.673798Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:42:51.673798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"L8XhWTpd+t4O18g9L4KB2/Jz+Ny0rf2DyZL2ySLesZgF+XIy6mFUrBeNQUqbVALFatq1U8w6uKEKnR/R0z4XAg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:42:51.674288Z","signed_message":"canonical_sha256_bytes"},"source_id":"2110.06222","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f0fcee5785c432d96aa0353c6cdb8a53731298d9c20f895273b1cb5cb8c245cc","sha256:0dcab897551190361267f75c4abc4e4aa950eb7c7c3e3f809c7c6099b029eb09"],"state_sha256":"021efc1531c108b2d39a0a4aaf30f8b716cf8891531d196869fc08ab126aede8"}